Pocket routing machine



March 1935. o. P. M. Goss ET AL POCKET ROUTING MACHINE Filed May 9', 1955 3 Sheets-Sheet 1 INVENTORS OLIVER R M. 6055 WORTH '6 6055 w ATTORNEY March 26, 1935.

O. P. M. (5055 ET AL POCKET ROUTING MACHINE Filed M s, 1953 s Sheets -Sheet 2 INVENTORS OLIVER RM. 6055 WMTH C. 6055 :2 ATTORNEY March 26, 1935.

o. P. M. 6055 ET 1.

POCKET ROUTING MACHINE Filed May 9, 1935 5 Sheets-Sheet 3 .34 l lllllllh k 4 ljlllll BURIED? IIII W TTORNEYQS Patented Mar. 26, 1935 p UNIT-Ea e rn-res" Mr. orri c'e Oliver. u. in; G055. ma: Worth o. Goes, same, Wash, as'signors to Carlisle Lumber Company,

acorporation of Washington I I I I Application Mary 9;: 1933,, Serial No. 67.6;090 i I.

i 3' Claims. (01% 1344+?) This invention relate's to macl'iines for cutting" Fig; (i is an: enlarged perspective View of" one out defects from lumber and it has reference of thecutters dismounted from the head. more particularlyto the provision of'a machine It-hasbeen found practical, in the patching of for cutting: out defects in commercial lumber lumber in accordance withthe invention-disclosed 51, for the reception of patches of definite size and in thisand the previously mentioned pending 5 character prepared by another machine; the" application; to 'pro-v-icle cutters for the formacharacterofithepatch and the method of applytion'of recesses or pockets of various-sizesarid ing and securing it being" disclosed and claimed to arrange for an easy'andreadyactuation: of in our 'co-pending' application filed on April 21', a selected cutter to suit the size or character of 1 1933;. Serial. No. 661219 and now Patent No. the defect which iti's-desired to-remove. In-ac-- 1 97-61722. oordancewith this idea we have illustrated in- It. is the principal-"object ct this invention to Fig. r a two unit machine wherein each unit is: provide. a machine oi the above stated charliliethe other inallrespects,except-asto size of acter whereby defects in lumber; such as knots; the cutter-head, therefore,'the'following descrippitch pockets, stains,scars and. the like; may be tion; as applied' to one unit w-ill appl y equally-l5 quickly and economically cutout and thereby to the other.

to provide pockets or recesses of uniform 'size- Referring more iii-detailto the'drawings+ and" shape into which repair patches, asdis- In its-present preferred: formof constructor closed in the above mentioned application, may the machine comp'r'isesa main frame structure be readily applied: 7 having a horizontal base 1- 'castintegral with an 20 lit is. also anobject of this invention" to proupright wal-lportion 2 supporting a horizontal vide: a machine which operatesgtoremove the bed 3. Webs-eintegral with the base,-wa1l and defect by'cutting: through the piece ina manbedsupport' the latter andadd' rigidity tothe her tosprovide ai'tapered' pocket i'nto 'whichaframe. i I similarly tapered; prepared 'repair patch may be' Cast on the back face of'the Wall 2 in each 25 snugly wedgedandiglued. unit,aretwo parallel, spaced: guide flanges 5-5 Still another object of thei'nventicni's to' probetweenwl'uchasupporting frame 6, for mountvide a. cutter head! including cutters of novel ing-the cutter-head and driving motor of that form; combination with achip breaker ar unit, isverticall-y slidable. On the upper endv ranged to co-act therewith to prevent damage of this frame a head casting- '7{ is fixed and-this 30 to the piece by reason of itssplinterihg' should has an integralyforwardly extended -ann tihori this occur by reason of cuttinglagainst the grain zontally overlying the bed 3. 'Fixedly mounted of the-piece. on thecastingi, at the back side, is an electric Other objects of the invention: reside in the motor- 9 and this has its'shait 10 extendedfor 5v various details of construction, and in the comwardl'yand revolubly through-suitable support- 3 bination of'partssand in their modeofoperati'on; ing bearings ll-to aposition substantiallycoas will hereinafter be fully described. extensive with-the arm 8' where it is equipped: with In accomplishing these and" other objects of a'cutter head 12. v the invention, we have provided the improved" When a piece of lumber, such as aboard or 40 details COIIStTU-Cfibn; the preferred forms Of plank; is to be operated on'by the cutterhead; it 40 which are illustrated in the accompanying dr'awj is" moved into position across the bed plate 3,281 ings; Wherein p seen i-rrFigs: l and 2; and the cutter then isactu- Fi 1" i a fr l va i n of azma hine ematedl downwardly against'the-board byadown' v y e p esent inventiongone cutter head' wardadjustment of the vertically slidable frame being in l w n h h r in. rai ed pos 6. Whenraised for'reception 'of the board, the 45" ticn. cutter head is disposed in that position which Fi 218 a si l v i n of the m hine with it is illustrated m Fig. 2,'where -it is supported' certain parts in section forpurposeofbetterillusthrough themediacy oi a piston rod 14 and a fluid tratiml. pressure mediumin ar cylinder 15 that is fixed Fig. 3' is a sectional detail of a part of th on the base-l 'below the slide frame. The c'y1in'-,50-

valve latch mec der, as seen in- Figs. 1' and 2; is vertically disposed- 4 is D, plain V w Of t e Valve, as and the piston rod is sli'd'able througha packed" associated with the latch mechanism; the valve gland-16in the upper cylinderhead. 15a andj'has';

bein s wn ud al s ti n. a-piston'lli fixed to theend within the-cylinderf.

- Fig. 51s a face view-of the cutter head; while its upper end extends through: a'lug' 18-55 on the back side and lower end of the slide frame 6 and is adjustably secured therein by 'nuts l919' threaded onto the rod against opposite sides of the lug.

Pressure medium, such as water, or other suitable fiuid, is admitted into and from opposite ends of the cylinder to raise and lower the slide 6 and cutter head under control of the valve device, designated in its entirety by reference character 20. This valve device comprises a valve' cylinder 21 that is bolted to the wall 2, and provided in its side wall at points spaced lengthwise of the cylinder with openings 22and 23 from which pipes 25 and 24 lead, respectively, into upper and lower ends of the cylinder 15. Intermediate these openings, is an opening 26 into which a pipe 27, supplying the pressure medium, is threaded, and at one end of the cylinder is an exhaust port 28 through which used medium is exhausted into a pipe 29.

Withinthe valve cylinder 21 is a sliding valve member 30 having an actuating rod 31 extended slidably through a packed gland at the cylinder end. This rod is operatively connected by a link 32 with a shift rod 34 that is disposed parallel with the valve cylinder and 'slidably mounted in a guide bearing 35 cast or fixed on the back side of wall 2. The shift rod 34 extends forwardly from the wall 2 and, as seen best in Fig. 2, has

'collars36 and 37 fixed thereon at its outer end in spaced relation. A coiled spring 40 is disposed about the inner end portion of the shift rod and bears at opposite ends against the inner end of the guide bearing 35 and a nut 41 on the rod so ;.as to yieldingly urge the shift rod to its inner limit of travel.

Forv manual actuation of the valve member to control admittance of pressure medium into and from the cylinder 15, we have provided a foot pedal 43, that is pivotally mounted on a horizontal shaft 44 that extends between webs 4-4 of the frame structure, as in Fig. 1. This foot pedal extends forwardly and is urgedto a lifted position by a spring 46 that bears upwardly against it. Also fixed on the cross shaft 44-is an arm 47 mounting a pivoted pawl 48 normally disposed at the back side of collar 3'7 on the shift r0d-34. Therefore, when the foot pedal is depressed, the pawl moves forwardly and engages the collar 37 and actuates the shift rod forwardly, and when the shift rod has thus been moved to actuate the valve member 30 from one of its extreme positions to the other, a latch 50 pivoted on the frame drops back of collar 36'to retain the valveshifting rod in its forward position against rearward action by the spring 40.

By reference to Fig. 3, it will be observed that the collar 36 that is fixed on the shift rod has an encircling shoulder 3601. with an inclined surface .3%.. Also that the latch 50 is disposed above and in alinement with the rod and has a latch tooth 50f shaped to fit against the inclined shoulder. This latchis pivotally supported on a pivot pin 52 extended between ears 53 cast on the. frame wall 2 and the inner end portion ofthe latch extends through a slot in the wall to a position at the inside of the wall. Whenthe shift rod 34 is moved forwardly from the position of Fig. 2,

by depression of the-foot pedal, the collar 36 simply lifts the latch head, in passing forwardly beneath the tooth 50' and the latter then drops back of thecollar to prevent return of the rod by-spring 40 when'the pawl 48 on the footpedal disengages fromthe collar 37 as the pedal is "finally depressed. Forward shifting of the rod 34 thus actuates the valve member 30 to such positionas to cause pressure medium to be admitted through the valve, as presently described, into the upper end of the cylinder 15 thereby to actuate the frame 6 from the raised position of Fig. 2 to the lowered position; however, on final downward travel of the slide frame, a stud 60 adjustably mounted in the lower end of the frame 6 engages the inner end of the latch'50 to rock the outer end upwardly thereby lifting the latch tooth 50 of the collar 36 thereby releasing the rod 34 for rearward movement under influence of the spring 40. This rearward action of the shift rod operates to move the valve member 30 accordingly, and thus the valve is again adjusted to cause pressure medium to fiow therethrough into the lower end of the cylinder 15 to lift the slide frame back to initial or starting position. Thus, unless the foot pedal is only partly depressed, a started operation is automatically carried on to completion for lowering and then raising the cutter.

The valve member 30, as seen best in Fig. 4, is designed to control the admittance and exhaustion of pressure medium from supply pipe 27 to the cylinder 15. It comprises two spaced heads 65-66 fitted to the cylinder and providing an intermediate clearance through which the pressure medium may flow as admitted from the supply connection to either one of the other of the cylinder connections, depending on the setting of the valve at one extreme or the other. The setting, of the valve for admitting pressure medium into one end of the cylinder 15 provides for exhaustion of the medium from the other end of the cylinder so thatthe piston 17 may move under, influence of the admitted pressure.

The cutter head 12 may be of standard constructionexcept for the special cutters applied. thereto. As seen best in Figs. 5 and 6, the head 12 is circular and is provided, at diametrically opposite sides with recesses '70 for mounting therein the cutters 71. Each cutter has a shank portion 71a seated in they head recess where it is held by a set screw, '72, and a foot 712) formed with a series of symmetricaLjequally spaced, V shaped cutting points '73, as seen in Fig. 6. These cutters are set in the head so as to point in the direction of rotation of the head, as indicated by the arrow thereon in Fig. 5;

In cutting a defect from a board, the cutter downwardly and through the board; It has a very definite downward and upward travel, and in order that variation in the length of the pockets will notresult by reason of difference in thickness of the boards operated on, it is necessary that the cutter head be lowered into the board to the same extent each time. Therefore,

wehave located .a horizontally disposed wooden pad 74 within a recess 75 provided to containit in the bed plate directly below the cutter. This pad is fitted in and movable with a support 76 at the upper end of a hollow slide 7'7 fitted for vertical travel in a cylindrical guide 73 fixed to the underside of the bed. A coiled spring '79 is disposed in the guide and bears upwardly against the closed upper end of the hollow slide '77 and urges the slide upwardly, thereby to yieldingly retain the pad at slight distance above the level of the bed plate. A rod 80 is axially contained in the cylindrical guide and this is fixed, at its upper end, in the support and is slidable at its lower end through a sleeve 81 that is threaded into the lower end head is actuated, while revolving at a highspeed,

Jill

wall' of the cylindrical guide, and has: a nut. 82'

threaded thereon to. engage the lower end of the sleeve to. limit upward travel oil the support.

The spring 79 rests onthesl'eeve 8'1 and its ten-- sion is adjusted by adjustment of the sleeve;

"At the'outerend of the arm 8-is ahousing-85 partially enclosing the cutter head, andat: oneside of this housing is, a vertical guideway 86" in which a slide 8 is fitted. This slide is .-rovided at its lower end with aebiturcateclipresser' foot 88' adapted to bear downwardly against a board along opposite sidesfof the head to.-

hold the board against movement. during. the

cutting. operation. At its upper endithis slide 87 is connected pivotally by a link 89- with. the

swinging: end of a lever 90. pivoted at 91 on:v

the housing. A. bolt 92'. is also: pivoted atone end: inthe housing, asat: and: extends upwardly through an opening'gi in: the arm am. 'a coiled spring 95 is disposed about the bolt and: bears against a nut" 96 threaded onto its outer end and against. the lever, thereby, through the connection, to urge the presser foot downwardly. The lever is limited in its downward swing so that when the cutter head is raised clear of the board, the presser foot also will be raised free of the board, but as the head is lowered, the foot engages the board to be operated on before the cutters take effect.

Likewise, at the other side of the head a chip breaker slide 98 is slidably fitted in a dovetailed, guideway 99 in the head. The guideway 99 is inclined inwardly from its upper end toward its lower end in the direction of the vertical plane of the cutter head mounting shaft. At its lower end this slide has an inturned foot 100 adapted to engage the board closely adjacent the outcoming side of the cutters so as to prevent splintering of the board by reason of the cutters working against the direction of the grain. This foot 100 has serrations designed to permit the pointed ends of the cutters to pass therebetween. At its upper end the slide 98 has a laterally turned portion 102 through which a bolt 103, parallel with the slide, extends.- The inner end of the bolt is fixed in the'housing, and a coiled spring 105 is mounted on its outer end and is held by a nut 106 on the rod so as to bear downwardly on the slide and urge it downwardly. The inturned part 102 of the slide is adapted to engage the housing when the head is lifted,

thereby to lift the foot 100 clear of the board. The housing 85 is hollowed out to contain the cutter head and a suction tube 110 enters the housing to carry off the chips and dust from the cutter. The inwardly inclined position of the guideway 99 provides that when the slide 98 is extended, the chip breaker 100 at its lower end will contact with the board closely adjacent the point of entrance of the cutter head and will automatically retract to keep in the clear of the cutter head knives as the cutter head advances into the piece.

Assuming that themachine is so constructed, it is used in the following manner: with both cutter heads in raised position, and motors 9 in operation, a board B, to be operated on, is passed to the machine across the bedplate 3. The operator locates a defect in the board and positions the board so that the defect is directly below one or the other of the cutter heads. This of course would be determined by the size of the defect as it is not desired to remove more of the board than is necessary.

After the board has thus been positioned, the

releases. itfor return movementv by spring 46.

48. on the 4'7. engages 'coll ar 337101: the shift rodfi'aand. moves the-rod forwardly so that it will be heldiinthatposition by the latch tooth 50" engaging back of collar 36. This actuation of the:

shift rod; causes as-lmil'ar movement of the valve slide 30 whereby pressure medium is admitted through the: valve. tothe upper endof cylinder 15; and the. cutter: head is thereby actuated down;- wardly to cut through the board to remove the defect. As the-cutter? head and. its enclosing housing 85 moves. downwardly, the pressertfoot 881s. pressed againstthe board to holdsit' against movement. during the cutti-ngl operation. A lso, thefootof the; chipbreakerslide 98i's pressed against the board .to cosact. witlrsthe cutter and. prevent damagexto-i the piece-'bycutting against the. grain.

In cutting through the piece, the cutters of the head I21. also form a. channel in the wooden. supporting pad 74 beneath the board and this pad then serves as a chip breaker for the under sur face of the piece being operated on.

If the piece operated on is of full thickness, the pad 74 will yield downwardly as the head is lowered to its limit of travel, but if the piece is less than full thickness, it is held inits slightly lifted position, thus to receive the cutter head to the full depth intended so that all recesses will be of the same length.

When the cutter head has reached its final downward travel, the head of latch 50 is tripped from the collar 36 by the depression of the inner end of the latch by the stud 60 on the lower end of frame 6 and the shift rod 34 is thereby released for rearward movement by the coiled spring 40 which operates to reverse the valve mechanism and effect an upward movement of the cutter back to initial position.

If it should be desired to hold the cutter head at a lowered position, this could be done by only partly depressing the foot lever so that the pawl 48 would retain its hold on collar 3'7 and thus hold the valve 30 in its forwardly adjusted position.

With a machine of this character, the defects in boards could be easily and quickly cut out and operator presses the control foot pedal 43 of the. selected cutter downwardly to its limit and then.

the." pedal isthus'. pressed downwardly, the pawl' pockets of accurate size and definite shapes could j be provided for the reception of patch plugs. Furthermore, the use of the rotating cutter heads makes it possible to form a pocket of a downwardly tapered form into which a patchmay be wedged.

Having thus described our invention, what we claim as new therein and desire to secure by Letters Patent is- 1. A machine of the character described comprising a bed plate, a downwardly yieldable support in the bed plate, a chip breaker block cone tained in the support and normally held thereby slightly above the plane of the bed plate for the support of a lumber piece thereacross, a revolving cutter head above the bed plate and block, a support therefor, means for moving the latter support to actuate the cutter downwardly and through a piece of lumber resting upon the chip breaker block; said block being adapted to be formed with a recess by the cutter head in passing through a lumber piece and to prevent chipping of the under surface of the piece by the cutter.

2. A machine of the character described comprising a bed plate, a downwardly yieldable sup port in the bed plate, a chip breaker block contained in'the support and normally held thereby slightly above the plane of the bed plate for the support of a lumber piece thereacross, a revolving cutter head located above the bed plate and'block, a supporting frame for the cutter head, means for moving the frame'vertically to actuate the cutter head downwardly and through a piece of lumber resting on the chip breaker block; said block being adapted to be formed with a recess by the cutter head in passing through the lumber piece and to prevent chipping of the under surface of the piece,

. bar to maintain its spacing relative to the cutter head.

-3. In a machine of the character described,

a board supporting bed, a carrier, a cutter head revolubly mounted by the carrier and movable therewith directly from and toward the bed to cut through a board located-thereon, a chip breaker block set in the bed for the support of the board thereon and adapted to receive the cutter head thereinto after it has passed through the board, a yieldable presser foot adapted to engage with the board in advance of the cutter to hold it against movement on the bed during operation thereon; said cutter head carrier being formed with a guideway angularly inclined relative to the line of travel, a chip breaker foot slidably movable in said guideway and a spring bearing thereagainst to urge it to an extended position thereby to cause the foot to engage the board close to the line of entrance of the cutter head and to move away from this line in accordance with the advancement of the head into the board.

OLIVER P. M. GOSS. WORTH C. GOSS. 

